Gear-generating machine.



' K. HEPFNER. GEAR GENE-'RATING MAGHNE. f

APPLICATION FILED APR. 1,'1912.'

1,054,846. l Patented Mar. 4, 1913.

3 SHEETS-SHEET l.

O ul ma K. HOEPFNER. GEAR GENERATING MACHINE.

APPLICATION FILED APR-.1, 1912.

Patented Mar. 4, 1913.

3 SHEETS-SHEET 2.

@f MM@ 62,62. Qfwk` K. HOEPFNER.

GEAR @HEATING MACHINE. APPLICATION FILED APR. 1, '1912.

Patented M3114, 1913.

y UNITED sTATEs .PATENT ornioii.

KARL aioiirrimn, QFCINCINNATI, oHIo.

To all lwhom t may concern.'

Be it known thatl I, KARL HoEPiNER, a subject of the Emperor of Germany, and a resident of the city ofrCincinnati, county of Hamilton, and State of `Ohio,have invented certain new and useful Improvements in Gear-Generating Machines, of which the foli lowing is a specification.

. My invention relates to improvements in Figure 1 is a sectional side elevation of a.;

geargenei'ating machine'embodying my invention, Fig. 2 isan enlarged detail section laken on line afiof Fig. 1, Fig. 3 isa vfront lelevation of the machine, Fig. It is, a vertical transverse section taken on lsubstantially line y's-y of Fig. 1, Fig. 5 'is a horizontal sec-A l tion taken on substantially line .z-a of Fig.

1, Fig.V 6 is a fragmentary vertical longitudinal section of the front end portion of the machine,and Fig. 7 is a sectionalfdetail of a portion of the construction. l

The preferred forni .of construction, as illust-rated in the drawings comprises a supporting frame or body 1 in the lower end portion of which is vrotatably mounted aA i ongitudjinally extending shaft 2, the latter' being provided with a pulley 3 through the medium of which the same may be driven as desired. Mounted in the upper -end of the machine adjacent one edge thereof is a'shaft i 4 which is operatively connected with the -shaft 2 through the medium of av belt 5 which passes around coplanar `pulleys 6.-

' Arranged co-axial with the Shafti is a shaft 7, the shaft 7 being operatively connected with the shaft et by means of a' sleeve 8` whichis formed upon the adjacent end of shaft 4 and inl which is slidably mounted the adjacent end .of-shaft 7, a transversely.

extending pin 9 provided in shaft '7 project# ing through diametric longitudinally eX- tendingelongated'lslots 1,0 providedin the Slee-ve 8,.'rel1ers'1f1being rterably provided uponxthe extremities uo pin '9 to lalleviate enanfenivnnarme MACH'INE.

- -Speecati9n of Letters Patent. Appiicaftion'niea Apr111,1912. 'serial 110.687,841.

Patented iviar. a, i913.

friction. With'this constructionit will be -seen that an operative connection is establishedfbetweemthe shaft 4 andthe shaft v7 which permits of relative sliding or longitudinal movement of the shaft 7. `The shaft 7 is rotatablymounted in. a, bearing meniber 12which is slidablyv mounted in the lupper end of frame 1, llaterally projecting flanges 13 provided at the base of the meml ber 12 dove-tailing with guides 14: provided at the upper side of said frame. Securedl upon the forward end of the shaft 7 is the cutting element 15, the latter being circular inA form and beveled at its clearlyshown in the severalJ views. f

periphery vas Arranged substantially,cent-ral. the frame 1 below t-hemember1-2 is a translveisely extending .oscillatory bar 16 upon which is secured. a bell crank lever 17. The arm 18 of the lever 17 projects'j upwardly through an opening provided in the upper side of the frame land into the member 1 2 as clearly shown in Figs@l -1, 4 and. 6. Formed in the inner side-ofthemeinber12 adjacent the arm 18 is a gudegrOQve or channel, 19 in which isv slidal'jly vmounted vka `block 20. The block 2() is carried bya screw 21: which extends longitudinallycf vthe l.groove .19 the upper, end of said screw being rotatably mounted in a bearing portion 22formedupon thehup/perv side of -the member 12, t e arrangement being such that 'longitudinal adjustment-of the blockl20 in. f

the groove 19 will be effected by rotation ofsaid'screw. The upper end of said screw is provided ,with a crank handle28 in order to -facilitate 'manual rotation thereof, as mentioned. Projecting from the block 2O is ',a stud 24 upon which is mounted a block 25 which isslidably mounted in a .guide` groove or channel '18 which is formed in the adjacent side of the arm 18. With this arrangement it will be seen that uponoscillation ofthe bellcrank 17, reciprocatory movement will) be imparted to the 'member t 12 `and hence to the cutting element 15, which is carried fthei'eby. Also," with thisarrangenient it `will be .seen that, adjustment of the amplit-udeofoscillation of the member 12 may be effected by adjusting the position of the .block 20 .in the groove 2,1, 'it ber ing clear that by adjusting saidA block toward A the upper end 4of lsaid groove the amplitude of reciprocation of the niember12. will be increased arid thatby ediustipg Seldblock towardthe lower end of said groove, vor

closer to the fulcrum of the lever 17, the amplitude of oscillationof said member will be decreased.

Oscillation of the lever 17 as just mentioned is secured through the employment of a gear 26 which is mounted upon a stub shaft. 9.7 mounted in the frame 1, as clearly shown in Fig. 5. In the gear 26 is arranged a block 28 which is slidably mounted in a radially disposed slot Q9 formed in said gear, said block bein-g adjustably held in said groove by means of a screWBO which is in threaded connection with said block, the respect-ive extremities of said screw being rotatably mounted in the end walls of said slot. In order to 'provide for longitudinal adjustment' of the block 28 in the slot 29, one end of the screw 30 is provided with radial slots 31 which may be engaged by the point of a tool, such as a nail to eff feet rotation of said screw and hence longitudinal adjustment of said block, as will be readily understood Projecting from the block 28 is a stud 32 upon which is loosely mounted a block 33 which is slidably mounted in' an elongated slot 34 provided in the other arm 35 of the bell crank 17. With this arrangement it will be observed, that. oscillation of said lever is effected upon rotation ofthe gear 26, regulation of 'the amplitude of oscillation of said bell crank being effected by adjustment of the position o-f the block 28 in the slot 9.9, as above mentioned. The gear 26 meshes with a gear 36 which is secured upon a transversely extending shaft 37 which is mounted' in the frame 1, as shown in the several views. Secured also upon theshaft 37 is a worm wheel 38 which meshes with a worm 39 carried by the shaft 2. Thus an operative connection is established Whereb reciprocation of the cutter 15 will be e ected upon rotation o-f the shaft 2, this rotation of the latter also effecting simultaneous rotation of said cutting elements,. as above described.

Arranged at the front side of the frame 1 *is a vertically adjustable table 40, grooves 41 provided in the inner side of said table slidably engaging dove-tail' guide bars 42 formed upon the front side of the frame, as clearly shown in Figs. 1 and '3. Said table is supported upon the upper end of a screw 43 which is threaded at its lower end in a boss 44 formed upon the base of frame l, the upper end of said screw being in swiveled connection with the under side of the table 40, as clearly shown in Fig. 6. Rotatably mounted at the under side o-f the table 40 is a bevel gear 45 which is in spline connection with the screw 43. Meshing with the gear 45 is a bevel gear 46 which is carried at the inner end of a shaft 47 mounted at the underside of table. 40, the arrange-- ment being such that rotation of said will effect rotation of the screw 43 and hence vertical adjustment ofthe table 40. A crank handle 48 is provided at the forward'end of the shaft 47 for effecting manual rotation thereof.

Slidably mounted upon the Lipper side of the table 40 is a carrier 49 which is in dovetail connection with said table7 as clearly shown in Fig. 6. Sliding of the member 4%) upon the table 40 is secured by means of a screw 50 which is rotatably mounted at ils opposite ends in said table7 the central portion of said screw being in threaded connec tion with a lug 51 which depends from the under side of the member 49. lVith this arrangement it will be seen that. rotation of said screw will effect sliding of the holder 49 upon the table 40. Provided upon one end of the shaft 5() is a worm wheel 52 which meshes with a worm 53 which is secured to a shaft 54 mounted in bearings provided at one end of table 40. tively connectedwith the shaft 2 through the medium of an extensible link 55 which is connected at its respective extremities with the shafts 2 and 54 by means of universal joints or knuckles 56. With this arrangement it will be seen that rotation of the shaft 2 will also effect sliding movement of the holder 49 upon the table 40 but at a very slow speed. A crank handle 57 is provided at the forward end of the shaft 54 for eecting manual rotation of the latter. By this arrangement it will be observed that the ,cnt-ter and Work make a large number of reciprocations and oscillations in unison with each other while the work is moving past the cutter, so that theportions cut during each reciprocation and oscillation will be so close together and vary so little from each other that they 'will constitute practically one continuous cut.

4Arising from the holder 4.) are spaced bearing arms 58 in the upper ends of which is rotatably mounted a shaft 59. The shaft 59 serves as the work-holding member or element, the work or gear blank 60 which is to be operated upon, being secured upon said shaft by means of a nut 61, as clearly shown in Fig. 3. The shaft 59 is so arranged that the work 60 which is mounted thereon will be positioned for engagement with the cutter 15 and so that when said work 60 is moved past the cutter 15, by movement of the holder 49, a cut will be made in the member 60 to form al tooth therein.

Loosefly mounted upon the work-holding shaft 59 is a segmental gear G2. the gear teeth at the lower end thereof meshing with a rack bar 63 which is mounted for transverse sliding in the holder 49. The rearward end of the rack bar 63 is formed with a vertically extending elongated slot 64, in which is slidably mounted a block 65. Exl

The shaft 54 is operal moesen tendine tliiouffli the bloei: 65 is e ber 66 the extremitic: which -are secured in the lower ends ot :iinis l? secured to and depeiidi i the shattlllitli this argement. it, will be seen that oscillation the segmental weer d2 will be eiected ,by i'eciprocsition ot the rin-li; tarot', such reciprociition ot' the hitter by' i ciired by connection therwi'-Lvitli the .t ll' criinlr 1l' through the block 6o, the bnr {it} end the arms 67. Mounted in the upper end ot' the segi. nient-al gee 1 i `is a Worin liicli meshes with yforni "wheel .69 secured te the she-ft 59. i-bperative connection is thus esteblished between the segmental gear the Work-holding shaft 59 so that upon oscillet'ion'of said segmental gear, as above men tioned, corresponding .oscillz-itory movement' will be imparted to the Work member 60. Connected with the Worin (58 isA :i crank handle 70 whereby siiid Worn-i may be rotat-ed in order to rotatably :idjust the Work relative tothe oscillating meansl therefor, neinely the segmental gear'tSQ. In operation such adjustment of the-work is necessary in order to present new portions of the gear blank for cutting teeth or grooves therein. The worm 68 and hence the Work is held in positions of adjust-ment relative to the segment 62 by'means of a spring-held retractable pin 71 which is slidably mounted in the handle mend which is adapted to engage anyone of a plurality of. perforations 72 provided in a disli: 72 formed at the upper end or the gear 62, as 'clearly shown in Figs'7 and 3, With this arrangement it will' be seen that in order to rotntebly edjiist the'worlr it is first required to' retract the pin A71 and then torotate the handle 70. By providing a. plurality of erforetions @which Iere uniformly space in l kcutting the geeiteeth itis` only required to' intermittently rotate the handle70 and enl gage the pin .7l thereof successively with erich of the p'erforstionslQ, the perforations thus i i serving to-nniformlyspece the teeth which will be formedin Ithe gear blank.'

In' the 'operation of the machine, the varions parts'will be so adjusted Athat the speed of reciprociition'of the cutter 15 will correspond 'with the peripheral speed of oscillation di' the Work men'iber or gear blank 60, thecutter and Work member or gear blank thereby being moved. in unison. The reciprrcatory movement of the cutter together with the oscillatory movement of the gear blank will ettect the formation of'a groove in the geur blank which will form a gear tooth of proper cycloidal form.- The various adjustments affordedl render it possible to ".fmaintain this uniform speed regulation of the movement of thecutter end of the pe-` ripliery of the Workmemberor gear blank irrespective Aof .the diameter of the blank provision. the geni' blank may be moved p toward or from the cutter, :is desired.`

A geni generating machine oi' the con-A struction set forth is durable lind economical `and is of high etiiciency in operation.

While I have illust-rated and described the preferred form ot' construction for carrying my invention into eiiect, this is capable of vnriation and inodiiication Within the scope of the claims witl'iout departing from the spirit of the invent-ion. L therefore, do not wish to be limited to the precise detailso coi'istriiction set forth, but desire to avail niyseliC of such variations and modifications as come v1within the scope of the appended claims. Y

vHoving described my invention What l chiiiii as new and 'desire to secure by Let-f ters Patent is:

jl. ln av machine of the character described, the combination of n reciprocatory4 cutting element; Van oscillatory Work-holdy ing member; 'and means for reciprocating seid cutting element and oscillating seid Work-holding member so that the speed of reciprocfition of said cutting element will correspond -with the peripheral speed of theN work carried by said worloholding member,

substiintielly :is described.

'2. In e machine of the character de- Qscribed, the combination of e, reciprocatory rotary cutting element; an oscillatory and axially movable work-holding member; and means for driving seid cutting element and sfiidwork-holding member so that the speed of reciprocation ol seid cutting'element vWill fcorrespond with the peripheral speed of the work carried by said work-hol substantially as described.

3. l'n e. machine of the character de'- scribed, the combination of a reciprocatory rotary cutting element; an oscillatory and axiallyv movable work-holding member, said cutting element reciprocating in the same plane as that inl whichthe Work is oscillated by said work-holding member; and means for drivingsaid cuttingl element and said Worlt-holding nieniberso that the speed of reciprocation of' said cutting element will correspond with the peripheral speed of the Work carried by said work-holding member, substantially iis described.

- 4. In a machine of the character described, the con'ibinition of a reciprocetory rotary cutting element; anoscillatory and axially movable Work-holding member, said cutting element reciprocating in the same ding member,

plane as that in which the Worlt'is oscillated bywseid wor]@holdingmember; means for holding member' so that the speed of reciprocation of said cutting element will correspond with the peripheral speed of the work carried by said work-holding member; and meansl for rotatably adjusting the work relative to the driving means therefor, substantially as described..

5. In a machine ot' the character described, the combination oi a reciprocatory rotary cutting element; an oscillatory and axially movable work-l'iolding member, said cutting element reciprocating in the same plane as that in which the work is oscillated by said work-holding member; means for driving' said cutting element and said workholding member so that'the speed of reciprocation olf said cutting element will correspond with the peripheral speed of the Work carried by said work-holding member; and means t'oiperating with said work-holding' member for, rotatably adjusting the work carried thereby relative to the driving means therefor, substantially as described.

t5. In a machine of the character described, the combination of a reciprocatory rotary cutting clement; an oscillatory workholding member, said work-holding 'member being movable to feed the work transversely ot the axis ot' said cutting element, said cutting element reciprocating in the same plane as that in which the work is oscillated by said work-holding member; driving means; an operative connection between said cutting element and said work-holding member whereby the speed of reciprocation of said cutting element. will correspond with the peripheral speed of the work carried by said work-holding member; manually oper-4 able means cooperating with said workholding member for rotatably adjusting the work carried by the latter relative to the driving means for said work-l'lolding member; and means tor releasably locking said work-holdingv member in positions of adjustment, substantially as described.

7. In a machine of the character described` tht` combination of a reciprocatory rotary cutting element; an oscillatory work holding member; oscillatory means for reciprocating said cutting element and for oscillating said work-holding member, said work-holding member being` movable to feed the work transversely ot' the. axis ot said cuttingelement; means for moving said work-holding member to teed the work, said cutting element reciprocating in the same plane as',tliat in which the work is oscillated by| l'said work-holding member;`

driving means; and an operative connection between said cutting element and said workhelding member whereby the speed of reciprocation of said cutting element will cor respond with the peripheral speed of the work carried by said work-holding member, substantially as described.

8. In a machine of the character described, the combination of a reciprocatory rotary cutting element; an oscillatory workholding member; an oscillatory lever for simultaneously reciprocating said cutting element and oscillating said work-holding member, said work-holding member being movable to feed the work transversely ot' the 'axis of said cutting element; means for moving said work-holding member to feed the work; said cutting element reciprocating in the same plane as that in which the work is oscillated by said workfho'ding member; driving means; and an operative connection between said cutting elemen; and said work-holding member whereby the speed of reciprocation ot' said cutting ele-. ment will correspond with the peripneral speed of the work carried by said workholding' member, substantially as described.

9. In a machine of the character described, the combination of a reciprocatory rotary cutting element; an oscillatory workholding member; an oscillatory lever for simultaneously reciprocating said cutting element and oscillating' said work-holding member; means for adjusting the throw of said lever in actuating said cutting element and said work-holding member, said workholding member being movable to feed the work transversely of the axis of said cutting element, said cutting element recipi eating in the same plane as that in .whit .i the work oscillated by said worleholding member; and driving means for moving said work-holding member to feed the work transversely of said cutting element and for rotating' said cutting element and oscillating said lever, substantially as described.

l0. In a machine of the character described, the combination of a reciprocatory rotary cutting element; an oscillatory and axially movable work-holding member, said cutting element reciprocating in the same plane as that in which the work is oscillated by said work-holding member; means tor driving said cutting element and said workholding member so that the speed of reciprocation of said cutting element will correspond with the peripheral speed ot' the work carried by said work-holding member: and means Jfor adjusting said workholding member toward and from said cutting element, substantially as described.

l 1. In a machine ofthe character described, the cmnbination of a rcciprocatory rotary cutting element; an oscillatory work-hold ing member, said work-holding member being movable to feed the worktransversely of the axis of said cut-ting element, said cutting element reciprocating in the same plane that in which the work is oscillated by said work-holding member; driving means; an operative connection between said cutting element-and said work-ho1ding member whereby the. speed of reciprooation of and means for adjusting said Work-holding said cutting element will correspond with member toward and from Said Cutting ele- I the peripheral speed of the Work carried by ment, substantially' as described.

said work-holding member;.manua1ly oper- In testimony whereof I have signed my 5 able means coperating with said rWorkname to this specification in the presence of 15 holding member for rotatably adjusting the two subscribing Witnesses. A

Work earried by the. latter relative to the KARL HOEPFNER.' driving means for said Work-holdin mein- Witnesses: ber'; means for releasably locking sai Work:`y y MARY A. MESCH,

lo holding member in positions of adjustment; WMR F. ROGGE. 

